Authors

Abstract

The electric mini-tiller can produce extra heat during working, which leads to the problem that the span life of battery is shortened significantly. So, it is crucial to deduce the process of heat dissipation regarding batteries and show the simulations with Fluent. The data indicate that most of cells would generate the ideal temperature range under the natural condition, and thus the mode of forced cooling for batteries is imperative. In order to research the influence of different factors including the temperature, the velocity and the passage form of cooling liquid, an orthogonal experiment table has been designed and then the scheme of cooling is optimized. Compared with the control, the optimized outcomes imply that all cells are in the expected scope and the difference among cells is reduced obviously, extending the service life of batteries.

Abstract in Chinese

电动微耕机在作业过程中会产生明显的热量，将造成电池组寿命的过早衰退。推导了电池组的散热过程，使用Fluent软件仿真了电池的温度变化。数据表明自然散热下大多数电池单体的温度将偏离其最佳范围，因此需要采取强迫冷却。为分析冷却液体的速度、温度和通道对电池组散热的影响，设计了正交试验表，对电池组的散热方式进行了优化。结果显示电池组单体温度都在最优的范围内且不一致性明显降低，这将有助于延长动力电池组的寿命。